Kramer versus Rosewall? Not serious.
Gonzales? Rosewall had less success than Hoad against prime Gonzales.
Sedgman? In the fifties, neither Hoad nor Rosewall played an extended tour against Sedge. On the 1959 Ampol World Championship, Hoad was 5 wins, 2 defeats against Sedge, Rosewall was 3 wins and 2 defeats against Sedge, and Sedgman won two tours, New Zealand and Europe, in which Rosewall played.
Hoad was 2 wins, 1 defeat against Segura in both the 1958 and 1959 championship tours.
1959 being the most representative year for both, Hoad was 3 wins, 1 defeat against Trabert, 6 wins and 2 defeats against Rosewall, etc.
If you are going to simply list names, we should attach some dates and numbers to them.
Yes, I rate the late fifties as the summit of tennis achievement, with the toughest field, tougher than the sixties or seventies.

Dan, I did not claim that Rosewall fared better against Pancho than Hoad did. I just contradicted you that Rosewall had weak competition.